Adding-machine.



W. F.- GATEWOODQ ADDING MACHINE. APPLIOATION I'ILED APR.10, 1913.

Patented Jan. 5, 1915.

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gfl/inm E Gafemood r V I W. F. GA TEWOOD. ADDING MACHINE. APPLICATION FILED APR.10.1913 1,123,515, Patented Jan.'5,1915.

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Mjpeases v "IHVeHfOI" 1 1. MY/Mm fifiafewaad W. F. GA-TEWOODL ADDING MACHINE. I AEPLIGATION FILED APEJO, 1913;

1,123,515., I PatentedJan.5,1915.

3 SHBETSSHEET 3.

m vemar Gafew'a od NITED srrarns PATENT orriion.

WILLIAM F. GATEWOOD, 0F PIERCE CITY, MISSOURI, ASSIGNOFK. T0 SIMPLEX ADDING MACHINE COMPANY, OF SAN ANTONIO, TEXAS, A CORPORATION OF DELAWARE.

ADDING-MACHINE.

To all whom-it may concern:

Be it known that 1, WILLIAM F. GATE- wool), a citizen of the United States, residing at Pierce City, Missouri,have invented a certain new and useful Improvement in ing machine of my improved construction.-

Fig. '2 is a plan view of the machine with the housing or casing removed. Fig. 3 is an enlarged sectional View taken approximately on the line 3-3 of Fig. 2.; Fig. 4 is a detail section taken approximately on the line 4-4 of Fig. 3.- Fig. 5 is a detail section taken approximately on the line 5-5 of Fig. '2. Fig. 6 is a plan view partly in sec- .tion of parts which are arranged transversely beneath the center of the disk of my improved machine, which parts are for the purpose of returning the main disk and the secondary disk to their original positions. Fig. 7 is a side elevational view of the parts seen in Fig. 6. Fig. 8 is a. detail sectional view taken through the'upper portion of the shaft which carries the primary disk and showing a portion of the spring-actuated disk-moving finger.

My invention relates to new and useful improvements in adding machines of the type shown and described in the patent is sued to me May 9, 1905, No. 789,688.

The principal objects of my present in vention are,to provide a machine of simple and economical construction which can be readily used for accurately and quickly adding. up columns of figures; to provide a novel! form of adding machine having a revoluble .disk combined with a series of keys in such a manner that the actuation of any key will shift the disk at distance corresponding to the position. of the actuated key; to provide simple means whereby the disk is positively moved the proper distance by the actuation of one of the keys; to provide simple means for controlling the movement imparted to the disk and preventing over-rotation thereof; to provide means for effectually locking thedisk against.-movement in either direction while the same is Specification of Letters Patent.

I Patented Jan. 5, 1915.

Application filed April 10, 1913. Serial No. 766,153.

at rest; to provide a novel arrangement of transfer mechanism, whereby the movement of the main disk'is transmitted to an auxil- .iary or secondary disk for designating a higher order of numbers; to provide simple key-actuated means for'zeroizingthe main and auxiliary disks, and finally, to generally.

improve and simplif the construction of the addingmachine disclosed in my patent hereinbefore referred to. i

With the above and other objects in view, my invention consists in certain novel astures of construction and arrangement of parts hereinafter more fully described and claimed.

The operating parts ofrny improved addj ing machine are mounted on a suitable base 10 of wood or metal, and ar'ran ed above the rear portion of this base an parallel therewith is a transversely disposed plate 11, the ends 12 of which are extended downward and fixed to the base near its sides in any suitable manner.

lournaled in suitable bearin s formed in the base 10 and in the center 0 the plate 11 is a vertically disposed shaft 12, and fixed thereto and occupying a position immediately beneath the plate 11 is a disk 13 provided near its edge with arow of apertures 14, the. lower ends of WlllC-l'l are countersunk and on top of said disk these apertures are numbered from 00 to 99 inclusive.

Arranged on the base a short distance in with the odd numbers in one row and the even numbers 1n another row, but it will be readily understood that a greater or less number of keys can be utilized if desired.

By providing keys higher than 9 it-is possible to rapidly add in the machine with one operation two or more combinations of lower numbers, as, for instance, three 6 s or two -"9s can be added by depressingthe 1s key, or two y introduced by depressing the 16:-key:

The forward ends offltheke :le versl project beyond the rear end of t a block 15,

and connected to the rear end of each lever 1 is a shortretractile coil spring 19, the lower end of which is connected to the base 10.

Fixed to the ends of the arcuate block 15 lyre standards 20, and pivotall mounted therein are the forward ends of arms 21 which are radially arranged with respect to the shaft 12, and the torwardends of these arms are corfn ected by an arcuate bar 22 which occupies a position immediately-over the rear ends-of the key levers 17;

Loosely mounted upon the upper end of the shaft 12 and supported by a collar 23 which is fixed to saidshaft 12 is a grooved collar 24, to which it fixed on end of a diskactuating arm 25, tli opposit end of which is provided with a loop 26 which is loosely mounted upon the arcuate bar 22. Fixedto this arm is an upwardly projecting pin 27 which is adapted to engage many one of the apertures 14 in the disk 13. Constandard is a detent 30 provided in its upper edge with a notch 31. This notch is normally "occupied by the forward portion of the arm 25, and the upper edge of this detent in front of this notch is inclined, as designated by 32, so as to permit the arm 25 to readily return to its normal position in the notch 81. after said arm has been actuated to move the disk. T he end of the detent 30 opposite the end provided with the notch 31 is weighted, as designatedby 33, in order to maintain said detent in proper position. 4 Seated in a block on the base 10 immediately to the rear of the left hand end of the block 15., is a pin or screw 34, and loosely mounted thereon is the coiled portion 35 of a spring, the upright log 36 ofwhich is positioncd immediately in front of the deten/030 behind the forward end of the arm The horizontal leg 3'7 of this spring passes through an aperture formcd in the lower end of a link 38, the upper end of which latter is pivotally connected to the left hand end of the arcuate bar 22.

Under normal conditions there is no tension in the spring-just referred to, and the arcuate bar 22 is elevated before an actuw,

tion of one of the key levers the link 38 is drawn upward, thereby drawing the free end of the horizontal leg 37upward, and

consequently storing power in said spring the disk in either direction and hold the before the forwardend of the arm 25 has been elevated free or wholly out of the notch 31 in the detent 30.

Fixed to the left handends of the arcuj ate' block 15 are vertically disposed postsqc 39 provided with projections 40 above and below the arms 21, and these projections form stops to limit the vertical movement of -I said arms and the arc-uate bar 22; J M Fixed on top of the standard 20 at the 175 right hand end of the block 1 5is a for-v wardly prjecting spring and 41 whichpi overlies the edge of the disk 13, and carried by the forward end of this armis a short, depending pin 42 which is adapted to en gage in the apertures 14. Th1s" arrange-- ment provides a yielding restrainingypawl Y for holding the disk against movement in 1 either direction and preventing.over-rotation thereof. Depending from the spring arm 41 is apin 41, which is adapted to be engaged by the bar 22 when the same is elevated. Y

Pivotally mounted on the right hand end of the bar 22 is a spring-held arm 43,- the end of which carries an upwardly projecting short conical pin 44 which is adapted toengage in one ofthe apertures 14 when the bar 22 has been elevated thereby acting as a restraining pawl to preventmovement of same against over-rotation when the spring arm' ll is elevated. The spring which actuates this arm 43 normally forces the outer end of said arm upward, and. thus when the areuate bar 21 is actuated, the outer end of said arm 43 .will strike against the disk .13 with the pin at in one of the apertures 14:, and by reason of a yielding connection between said arm and said arcuate bar, said barcan move a short distance upward even after theend of the arm {13 is in contact a with the disk 13 during which no vement power will be stored in the spring .nnected to said arm.

Journalcd in the base 10 and plate 11 immediately to the left of the disk 13 is a vertically disposed shaft- 45, and carried by the upper end thereof is a disk 4.6 bearing on its upper surface the numbers from 1- to 9 inclusive, this disk representing the hundredths disk, for when the main disk13 has been rotated one complete turnthe smaller disk 4t: is rotated one-tenth of a turn, thereby bringing the l into view to indicate that has been added uponthe machine.

Arranged upon the shaft 45 is a torsional spring47, one end ofwhich is fixed to said shaft and the other end to the base 10. This torsional spring is for the purpose of returning the disk 46 to its normal position.

Depending from the disk 46, and arranged in a circular row. are ten pins 48, one of WlUClI, designated by 48",is longer than the others, and said longer pin occupies a position directly opposite the space between the 1 and 9 onthe face of said disk. Ar-

. ranged in the path of travel of the lower end of this longer pin 18 is a finger or de tent 49 which is fixed to and depends from the underside of the plate 11. When the disk 46' has. made one complete revolution, thereby indicating an addition of 900 the longer pin 4E8 will strike against the detent 49, thereby lockin the machine l6 one-tenth of a complete revolution, therebytransferring 100 to the small disk 46. The edges of the disks 13 and 46 lie immediately adjacent eachother, as shown in Figs. 2 and 7, and formed in the plate 11 immediately over said adjacent edges is an opening 51 through which the numbers on said disks may be observed.

The rotation of the disk 46 imparts winding movement to the spring 17, thereby storing power therein, and as said disk is 1'0- tated step by step, it isheld against reverse rotary movement by a detent or pawl 52 in the form of a lever fulcrumed at its outer end to the plate 11' and provided on its inner end with a beveled edge 53. This pawl or detent is drawn toward the disk 46 by means of a small retractile coil spring 54, and formed in the edgeof'haid pawl or detent is a shoulder 55 which is adapted to engage against any one of the pins 48.

The means for restoring the disks 13 and 46 to their normal positions will now be described.

Arranged to slide between suitable guides on the base'lO below the plate 11 is a bar 56,

the left hand end of which carries a vertically disposed plate 57, the upper edge of which lies immediately beneath the under side of the disk 13. The left hand upper corner of this plate 57 normally bears against the beveled edge 53 of the pawl or detent 52. Positioned on top of the right a hand port-ion of the bar 56 is a secondary bar 58, the ri ht hand end of'which is pivotally conneetec to said bar 56, and the right hand end of this secondary bar is provided with a transverse slot 59. through which passes a pin 60, the same being seated in the bar 56. The rear edge of the left hand portion of the bar 58 is provided with a series of rack teeth 61. which are adapted to engage the teeth of a pinion 62iformed on the lower portion of the shaft 12. 7

Formed integral with and projecting orwardly from the right hand portion of the bar 58 is an .arm 63 which is adapted to slide beneath a guide64 which is fixed to spring upward,

ard 65 projects upward from the base in", front of the forward end of the arm 63, and pivotally mounted on this standard is a bell crank 66, the lower endof the lon arm of whichbears against the right hand side of the arm 63'. The end of the short arm of this bell crank 66 has a pin andslot connection with a bell crank 67, which latter is fulcrumed on a suitable standard to the right hand end of the standard 65, and en and spaced apart from the Jase 10. A stand-.,,

gaging the short arm of this bell crank 67 is the rear end of a key lever 68, which latter is fulorumed on a suitable standard to the right of the block 15, and said key lever being provided on .its forward end with a disk 69 which occupies a position immediately adjacent to the right hand disks 18. A retractile coil spring 70 is connected to the arm 63 and to the adjacentde pendingend 12 of'the plate 11.

Fixed to and depending from the disk 13 a short distance from the edge thereof and adjacent to the projection 50 is a pin or lug 71, which, when the plate 57 is in normal position, just clears the upper left hand corner of said plate, but when this plate is shifted toward the left hand, its 4 upper edge is in the pin or lug 71.

A. housing or casing 72, preferably formed path of travel-of said of sheet metal, incloses the disk 13,plate 11, block 15 and parts associated therewith, as seen in Fig. 1, said housing .bein provided with an opening 73 which is directly above the opening 51 so that the numbers on the disks can readily be observed. The

front wall of the housing 72 is preferably curved so as to conform to the curvature of the block 15, and said front wall isver- 17 and 68.

'tically slotted to accommodate the key levers The operation of my improved machine is as follows: presses downward upon the disk 18 hearing the number which it is desired to add into The 0 erator en a es. and

the machine, and as the corresponding key lever is swung upon its fulcrum, the rear end of said lever is elei' ated, thereby engaging and elevating the arcuate bar 22. This bar must necessarily move a short distance up ward to free the forward portion of the arm '25 from the notch 31, and as the arcuate bar is thus moved upward, the link 38, is drawn upward. thereby drawing the leg 37 of the which operation stores power in said spring. The leg of this spring the rear endot the leverof said key against the arcuate bar 22, andthis rear end forms a stop against which the loop 26 engages, thus limiting the movement of the arm 25 and the disk 13. As the arcuate bar 22 is elevated it strikes against the finger -11,

thereby elevating the free end of the spring arm 41, and'consequently withdrawing the pin 42 from the aperture in which it has been seated. -This movement takes place an instant prior 'to the release of the arm 25 from the notch 31., and just before the sac uate bar has reached its limit of upward movement the conical pin 1L4, carried by the spring-actuated arm 48, will engage in one of the apertures 1d in the disk 13, thereby forming a restraining pawlvto hold the disk against movement in either direction during the interim between the withdrawal of the pin i2 from one of the apertures 14 and the release oi arm During the movement imparted to the disk by the spring acting upon th against t ei underside of said disk and passes in succession from one aperture 1% to the next, which movement is possible for the reason that the lower'ends of the apertures arelcounter-sunk and the pin 4% which is carried upon the spring actuated arm 43 is conical, and therefore, will yield downward slightly during the travel from one aperture to another. It will be understood thatthe manner of mounting the'arm 43 on the arv ,cuate bar permits said arcuate. bar to move 'upwardly a'short distance after the pin 44.-

'1 by said pin 44..

the depressed key is released, the cone 25 is returning to norma has engaged in one of the apertures 14, and

'- i'urther, that said arcuate bar on its return or downward mox'ement can move a short distance, and the pin 4% will remain in engagement with one of the apertures in the disk, which action is brought about by the spring connected to said arm 43. The pins H and 27 are of such relative lengths as that the pin :27 is disengaged from the disk 13 just prior to the disengagement of the pin 44 from said disk. Thus, when the arm 1 position the disk is held against movement in either direction As soon as the pressure upon sponding spring 19 draws the rear end of the actuated. key downward, thereby per- 'mitting' the arcuate bar tomove downward toiits normal position, and as this movement takes place, the link 38 is moved'downward, thereby restoring the spring comprising the legs and 37 toits' normal position. As

arm the conical pin is rides the arcuate bar 22 drops to its normal position, the forward end of the arm 25 whichisloosely connected to said baris drawn downward, thereby withdrawing the pin 27 fromthe aperture in which it has been engaged, and immediately thereafter the retractile coil spring "28 acts to return the arm to its normal position, and as it "reaches the pawl or detent 30, it bears against the beveled edge 32 thereon, thereby swinging said pawl or detent upon its pivot point until said arm passes into the notch 31. The weight 33 on the end of the pawl or detent restores the same to its normal position, thereby holding the arm "2-5 in readiness for the next opera tion. The retractile coil spring 28 is coma paratively light, and the action of the" spring comprising the legs 36 and 37 overcomes the resistance offered by said spring 28 when an actuation ofthe parts just described takes place. i It will be understood that the movements just described take place very rapidly and. in regular sequence, and an operator with little practice can very rapidly add up a column of figures by merely I pressing the proper keys. The operator by mentallynotmg combinations of several figures, can do away with 'the necessity of striking keys corresponding to all of the figures, for, if it is desired to add into the machine two 6 s the operator can accomplish this by striking the 12 key, or to add two 7 s the operation can be accomplished by striking the let key. As the various keys are depressed to add in the variousnumbers, the disk 13 is rotated step by step, and when the total has reached 99 the next movement imparted to the main disk brings the lug or" olution and bringing the number-1 on said disk into view through the openings 51 and 73.

As hereinbefore stated, the disk 46 is held against reverse rotation by the engagement of one of the pins 48 against the shoulder 55,, of the spring-held pawl or detent 52. After a column has been added up and it is desired to restore the disks 46 and 13 to "their-normal positions, the operator presses the key 69, thereby moving the lever 68 upon its fulcrum and consequently actuating the bell crank 67. This bell crank in turn actuates the bell-crank 66, and the lower end of the long arm thereof bears against the arm (33 and moves the same toward the left hand against the resistance ofiered-by the, rctractile spring 70.

The upper left band edge of. the plate 57 normally bears against the beveled end 53 of the pawl or dctent 52 so that the initial movement impartedv to the bars 56 and 58 toward the left hand actuates the detent or pawl )2 1n such. a manner as to withdraw the shoulder 55 from in front of the pin positioned against said shoulder, andthe torsaid disk to its normal position. The pres- 'sure of the long arm of the bell crank 66 against the arm 63 swings T;

the bar 58 upon its point of pivotal connection with the bar 56, thereby moving the, left hand end of said bar 58 rearwardly a slight distance so that as this releasing movement continues and the bars 56 and 58 slide toward the left hand, the rack teeth 61 on the bar 58 will engage the teeth of the pinion 62, thereby imparting rotary motion to the same, the shaft 12 and the disk 13 carried thereby. The force ofthis restoring movement overcomes the restraining pressure exerted by the spring arm'dl carrying the pin 42, and as the bar 58 moves transversely, the disk is returned to its normal positionwith the double 005 positioned-immediately beneath the,

openings 51 and 73. As the bar 56 moves"- toward the left-hand, the upper edge ofthc plate 57 is moved into the path of travel of disk the depending lug orp'in 71, and as the h t is 13 is rotated back to its normal position, lug or pin 71 strikes against the upper edge of the plate 57, thus stopping the disk at the proper point. As the pressure upon the'key 69 is removed, the retractile spring 70 re stores the bars 56 and 58 and other parts of the mechanism just described to their nor-t I mal positions."

A machine of my improved construction is comparatively simple in constrhction and operation, can be very rapidly operated, is very compact, can be manufactured at com- 'paratively little cost owing to the absence of complicated parts, and can be advanta geously used wherever it is desired to quickly and accurately add single columns of figures i It will be readily understood that minor and construction machine can he made and substituted for those herein shown and described without departing from the spirit of my invention, the scope of which is set forth in the ap pended claims.-

I claim:-

1. In an adding machine provided with a trotating disk and its operatingmechanism, which operating mechanism includes a pivotaly mounted arm and a key-operated bar with which said arm coiiperateaa spring for imparting movement to said arm, which spring is put under tension byinovement ot the key-operated bar, means for holding the arm against movement while tension, is being' imparted to the spring, and means for holding the dish against movement while tension is being imparted to the s ring.

2. In an adding machine provi ed with a rotating disk and its operating mechanism,

which operating mechanism includes a pivotally mounted arm and a key-operated bar with which the-pivotally mounted arm cooperates, a spring for imparting movement to the pivoted arm, which spring is put' under teiision by the movement of the keyoperated bar, means for holding the arm against movement while tension is being imparted to the spring, and means adapted to be released by the upward movement of the key-operated bar for holding the disk against movement during the time tension the initial movement of the actuated bar, means for holding the pivotallymb'iinted arm while tension is being imparted to the spring, and a spring directly connected to said arm for. returning the same to normal position after movement.

l. In an adding machdiie provided-with a rotating disk and its operating mechanism, which operating mechanism includes a pivotally mounted arm and a key operated bar codperating with said arm, a spring for imparting movement to the *pivotally mounted arm, which spring is put under tension by the initial movement of the key actuated bar, means for holding the pivdtallymount ed a'rm while tension is being imparted to the spring, a spring directlyconnected to said arm for returning the same to normal position after movement, and means for holding the disk against movement while tension is being imparted to the spring.

5. In an adding machine of the class described, a rotatable numeral-bearing dish, a second revoluble numeral-bearing disk adapted to be partially rotated by the first mentioned disk as the same is completely rotated, a spring connected to the second mentioneddisk so that power is stored there in whensaid disk is rotated, spring-held means for holding the second mentioned disk against reverse movement, and a keyactuated means for releasing the springpressed means to permit the second mentioned disk to return to its normal position, and which l ey-actuated means engages directly with the axis of the first mentioned I eluding a series of key levers for imparting movement to said d1sk,a pin depending from said disk, key-operated mechanism, a portion of which enigm gies directly with the axis of the disk for restoring the same toits normal or zero position, and a plate on said key-o erated means, which plate is moved into t iepath of 'trajvel of the pin carried by the disk 'toform a stop for the reverse more ment of said diskl 7'. In an adding machine, provided with a vertically disposed shaft, a pinion thereon, a numeral-bearin disk carried by said shaft, and means inc uding a series of key 8. In an adding machine, provided ,vvith a vertically. disposed shaft, a pinionthereon, "a numeral-bearingv disk carried by,.said

shaft, and means including a series ofkey levers for imparting movement to saiddisk, f a sliding plate, arack bar pivotallyimounted on said slidin plate and norma y ontofengagemdnt with the pinion, key-ope'i' means for moving saidrack bar into n. gagem'ent with the pinion and'then actuating said rack bar to effect rotation of the l1 shaft and. parts carried thereby, and sliding plate means forstopping'the' reverse rotary movement of the disk at a predetermined point. I

In testimony whereof Ili'ereunto aflix my signature in the presence of two witnesses, to

this 1st day (if.,April,,l9l3. WILLIAM F. GATEWOOD.

Witnesses:

P. A. Ronsnns, W. F. BRnNDLINenn. 

